Anyway..A more serious airgun for my kid this time, after some Nerf projects.

I set out to build him something to last a lifetime, a wallhanger for when he's grown.

So...I decided to make a muzzleloaded coaxial repeater, in a Lukens kind of style.An airgun to resemble a flintlock musket..wich will launch anything shoved down the barrel.Soft and light stuff at first...he's still young.

I used the tubes from a motorcycle front end, since they served me so well last time.Thick smooth steel walls...The original plug was drilled to accept the barrel and an O-ring seal.

The piston is made from thick rubber, with an O-ring superglued to it.The O-ring naturally expands against the reservoir walls.I used one slightly larger than the I.D. and pressed it onto the piston with a brass cilinder while the glue set.All in all it is 100% airtight -one way offcourse, and comparable in weight to a QEV piston.A light spring keeps it in position and prevents it from flipping over.

It actuated spot-on..just like a factory made QEV.

A hammervalve is added to pilot and an extra supply of air is held in the buttstock.I've restricted flow between the valve and buttstock to act asif the piston would have a tiny equalisation hole, yet it doesn't.

Same type of system as I used on Old Shat, just a different approach.

Tapping the hammervalve to fire, repeat untill the gun is empty...

Just started on the project, the hammer shown is just a mock-up.I need to set the fillplug in place, add a trigger mech, hammer, sights, paint, woodwork, engrave it some, decorate etc.. etc...

And boy do those scrathes pop out on camera! Wyz should have a blast!

But here are the first few pictures:

(More will follow)

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This is the idea..basically.Will need to add a ramrod to the front grip though...

Last edited by Brian the brain on Wed Sep 18, 2013 3:28 pm, edited 4 times in total.

Gun Freak wrote:
Oh my friggin god stop being so awesome, that thing is pure kick ass. Most innovative and creative pneumatic that the files have ever come by!

Looking good, I wish I had a father like you Finally some decent photos I wouldn't use a rubber piston if he gun is build to last, they suck oil and get stuck... at least in my case.Actually I'm making big progress on something that I'm not so shamed to show you right now

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CpTn_lAw wrote: "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? "

Looking great as always Brian I especially like the MS paint artist's impression hehe

Thanks!You always say that...If the idea doesn't come across with a simple sketch...it is most likely not thought through very well.

I've been building stuff that shoots for so long that the real challenge is no longer to make it simply work.My goal is to make it work simple.

I've made another lock-plate as I couldn't get the internal stuff mounted on the initial one.The brass receiver is partially in the way of anything rotating there...and then there's the airline to the stock...

I needed to move the hammer(-axle) location back so I'd have room behind it for the trigger parts.I'd already drilled the hole...so I needed to repace it alltogether.

After looking through some books on flintlocks I decided to make the front of the plate longer to allow an external leafspring.This too frees up space inside and looks about right too.The leafspring will drive the hammer, wich I will sculpt from thick sheetmetal.

Pictures will follow after I fit the hammer...Haven't yet found the wood to make the stock..

Looking good, I wish I had a father like you Finally some decent photos I wouldn't use a rubber piston if he gun is build to last, they suck oil and get stuck... at least in my case.

I wish I'd had a father like me..I wouldn;t have had to buy the tools and learn the trade myself... If you would see the piston you'd know..It's less than 6mm long in all.Shorter than the piston in a QEV.If the glued-on O-ring expands with oil it still won't have enough surface area to get stuck.

It can't lodge itself.

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Gun Freak wrote:
Oh my friggin god stop being so awesome, that thing is pure kick ass. Most innovative and creative pneumatic that the files have ever come by!

anyways...I haven't made the hammer yet as I had to work out the exact dimensions.The leafspring has to be able to give it enough momentum to knock open the pilotvalve at fairly high pressure.The hammer needs to hit it at the right angle and have enough travel from " top dead center".

On top of that the weight needs to be just about right.I worked it all out in a prototype hammer.Without a trigger I simply cock it to the point where the leafspring keeps it in balance and give it a gentle push forward.

I managed to get 6 good shots from a 10 bar fill.

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Top dead center..?

I still need to clean it all up...don't worry...

Gun Freak wrote:
Oh my friggin god stop being so awesome, that thing is pure kick ass. Most innovative and creative pneumatic that the files have ever come by!

So let me get the system straight, the hammer valve just drops the pressure a little causing the piston to move back, but since pressure remains in the pilot it pushes the piston back forward once enough air leaves the chamber?

You've got it about right Gunfreak.The pressure drops more than just a little though.It all happens fast.

The reason I don't want multishot this time is :This is more fun when it comes to actually shooting it.

I've made enough stuff to know what I like and what I don't like..

The original Shat is a multishot.I don't like the uniform ammo needed for smooth operation.After demonstarating it to my neighbour I muzzleloaded it with tater and bb buckshot and realised it was more fun that way.My son got the opportunity to fire it a couple of times..

Just shove anything down the barrel and launch it.

Accuracy is pretty consistent with a real blunderbuss.... I intend to keep pressure under 300 psi as it's for my kid.

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Gun Freak wrote:
Oh my friggin god stop being so awesome, that thing is pure kick ass. Most innovative and creative pneumatic that the files have ever come by!

That's f*cking nice!It'll be on hell of a antique muzzle loader, if you do some aging on the metal it will look good enough to have it's place inside a museum. Your garage it's sure a place that I'd pay for a ticket to visit.That's an odd spring setup, so I guess the pilot valve is very easy to open.

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CpTn_lAw wrote: "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? "